import type { FormatDistanceFn, FormatDistanceLocale } from "../../../types.ts";

type FormatDistanceTokenValue =
  | string
  | {
      one: string;
      other: string;
    };

const formatDistanceLocale: FormatDistanceLocale<FormatDistanceTokenValue> = {
  lessThanXSeconds: {
    one: "1초 미만",
    other: "{{count}}초 미만",
  },

  xSeconds: {
    one: "1초",
    other: "{{count}}초",
  },

  halfAMinute: "30초",

  lessThanXMinutes: {
    one: "1분 미만",
    other: "{{count}}분 미만",
  },

  xMinutes: {
    one: "1분",
    other: "{{count}}분",
  },

  aboutXHours: {
    one: "약 1시간",
    other: "약 {{count}}시간",
  },

  xHours: {
    one: "1시간",
    other: "{{count}}시간",
  },

  xDays: {
    one: "1일",
    other: "{{count}}일",
  },

  aboutXWeeks: {
    one: "약 1주",
    other: "약 {{count}}주",
  },

  xWeeks: {
    one: "1주",
    other: "{{count}}주",
  },

  aboutXMonths: {
    one: "약 1개월",
    other: "약 {{count}}개월",
  },

  xMonths: {
    one: "1개월",
    other: "{{count}}개월",
  },

  aboutXYears: {
    one: "약 1년",
    other: "약 {{count}}년",
  },

  xYears: {
    one: "1년",
    other: "{{count}}년",
  },

  overXYears: {
    one: "1년 이상",
    other: "{{count}}년 이상",
  },

  almostXYears: {
    one: "거의 1년",
    other: "거의 {{count}}년",
  },
};

export const formatDistance: FormatDistanceFn = (token, count, options) => {
  let result;

  const tokenValue = formatDistanceLocale[token];
  if (typeof tokenValue === "string") {
    result = tokenValue;
  } else if (count === 1) {
    result = tokenValue.one;
  } else {
    result = tokenValue.other.replace("{{count}}", count.toString());
  }

  if (options?.addSuffix) {
    if (options.comparison && options.comparison > 0) {
      return result + " 후";
    } else {
      return result + " 전";
    }
  }

  return result;
};
